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Duke Energy Rates

Pending Duke Energy Indiana cases of note include its:

In the most recent IURC survey of residential electric bills, Duke Energy's average bill ranked sixth-highest among the electric utilities the IURC regulates.

Base rates cover most infrastructure and operating/maintenance costs while rate adjustment “trackers,” as described below, allow for more frequent rate changes for specific costs as designated by law. The trackers were re-set when Duke Energy's current base rates were approved in June 2020 and are still subject to adjustments every three, six, or 12 months.

Base Rates

For information on Duke Energy's pending rate case, click here.

Current base rates for Duke Energy Indiana received IURC approval in June 2020 (Cause No. 45253). Prior to the case, base rates made up about 60% of a typical Duke Energy residential bill. As of December 2023, base rates comprise approximately 97.6% of a monthly residential bill for 1,000 kWh.

The utility's previous base rates were approved in 2004.


In addition to base rates, Indiana electric utilities recover and credit separate, specific costs through rate adjustment mechanisms known as "trackers." Rate adjustments via trackers are reviewed by the OUCC and approved by the IURC on a quarterly, semi-annual or annual basis.

Duke Energy's authorized trackers make up about 0.5% of a residential customer's typical electric bill as of March 2024.

Duke Energy is authorized to use the following trackers. All filings are available by entering the cause number in the IURC's Online Services Portal.

TrackerRecovers Costs forFrequencyIURC Cause No.
Fuel Adjustment Clause (FAC)Coal and other fuelsQuarterly38707
Environmental Compliance Adjustment (ECA)Federally mandated compliance costs including emissions control equipmentSemi- Annual42061
Transmission, Distribution, & Storage System Charge (TDSIC)Projects in 7-year infrastructure planSemi-Annual44720
Demand Side Management (DSM)Energy efficiency programsAnnual43955
Summer Reliability Adjustment (SRA)Capacity resources needed for system reliabilityAnnual44348
Regional Transmission Operator (RTO)Participation in Midwest Independent Transmission System Operator (MISO)Quarterly42736
Federally Mandated Cost Adjustment (FMCA)Critical Infrastructure ProtectionSemi-Annual 44367
Renewable Energy Project RiderRenewable Energy ProjectsAnnual44932

Additional Cases of Note

Previous Duke Energy cases before the IURC include:

  • Current fuel cost adjustment (Cause No. 38707 FAC 139)
  • Trackers approved under its approved 6-year infrastructure plan (Cause No. 45647)
  • Coal ash compliance project (Cause No. 45749)
  • Financing request (Cause No. 45766)
  • Most recent fuel cost adjustment (Cause No. 38707-FAC135)
  • Utility Receipts Tax reduction (Cause No. TD-50550)
  • Proposed distributed generation tariff (Cause No. 45508)
  • 2017 Tax Cuts & Jobs Act investigation (Cause No. 45032)
  • Advanced metering opt-out tariff (Cause No. 44963)
  • COVID-19 investigation (Cause No. 45380)
  • Coal Combustion Residuals rule compliance projects (Cause No. 44765)
  • Electric vehicle pilot program - 2019/2020 case (Cause No. 45253-S2)
  • Electric vehicle proposal - 2021/2022 case (IURC Cause No. 45616)
  • Edwardsport integrated gasification combined cycle (IGCC) power plant (Cause No. 43114)
  • Energy efficiency plans (Cause No. 43955)

Sales Taxes

The seven percent state sales tax applies to all Indiana electric utilities.